Can't build _hashlib and _ssl optional modules using brew install on Mac OS X

[izumiberat]

Documentation
Mac OS Catalina 10.15.7.

I am getting the following message when following the documentation here: https://devguide.python.org/setup/#install-dependencies and running make -s -j2

The necessary bits to build these optional modules were not found:
_hashlib _ssl
To find the necessary bits, look in setup.py in detect_modules() for the module's name.

Could not build the ssl module!
Python requires a OpenSSL 1.1.1 or newer

For some reason, specifying the openssl version in the command line provided in the documentation resolved the issue:
brew install openssl@1.1 xz gdbm
As mentioned by @ezio-melotti in the PR python/devguide#891, it is awkward to have to specify the version of openssl as it should by default install the latest version. It nevertheless did the trick for me. As a test, I uninstalled openssl, and installed it again, without specifying the version in the command line, and this time it worked. It is unclear to me why, certainly some files that were created when installing the specific version.

I am therefore creating PR python/devguide#892 suggesting to specify the version if user faces this current issue.

[erlend-aasland]

Fixed by python/devguide#892. Thanks for the report and the PR, Izumi :)